Week 8 - Challenge 4 - Bumper

BUMPER

Aim

Create the bumper plastic component from the given Class A surface. To begin with, the tooling axis for the given class surface should be created to meet the requirements of the draft angle and end perform the draft analysis on the model.

Objective

• To create a tooling direction axis.
• To perform draft analysis for Class A and Final component
• Create class B and C from the given class A surface using different methods
• Taking the thickness of 3mm

Steps followed.

• The Class A surface is checked for the connectivity of the surface and ensures it is completely joined and there will be no gap between the surfaces.
• If it is not joined together, make it with a minimum tolerance of 0.001 or 0.003 and check for the connectivity of the surface.
• Connectivity of the surface can be done by 2 methods by join method and the boundary method.
• Creating the tooling axis, we can create the tooling axis by intersection method by creating a bisecting line
• Draft analysis on class A and identify the draft angle then give the nominal value.

Tooling Axis.

• The direction in which the mould opens and close is called the tooling axis direction.
• Check the connectivity of the surface and ensure there will be no gap between the surfaces and then define the tooling axis.
• While creating a tooling axis, Please ensure to give the tooling axis on a flat surface or the surface which have a hole in it.
• Create a point in the middle of the base surface by using a point on the surface comment. Then create an intersection for the surface and extract the reference line which will be helpful for creating the dummy tooling axis using the Intersecting method by creating a bisecting line.
• Use the line command and draw the lines which is aligned with the extracted line and extended it to the required length.

Draft Analysis.

The draft allows for the component to release from the mold. Most parts or applications require a minimum of 0.5 to 1 -degree draft angle and a 3-degree draft angle is widely used as per the norm

Then changes the material mode to customize mode before moving to the draft analysis.

Insert- analysis- Feature draft analysis.

Defining the draft direction, select draft analysis from the toolbar and click on the compass symbol and pull the combos from the right top corner of the workbench and place it on the component where want to do the draft analysis. 'W' Of the compass and tooling axis Should be aligned on the same line.

Once the compass is aligned with the tolling axis, click on the lock symbol and drag it on the surface. We will get a wrong mark. Then select the point, and a table will appear. It will show the draft value on the table. We can adjust the draft value. Add analysis it for all the edges and surfaces.

By clicking on the surface and using the flipping tool we can assign the flipping direction. The color of the surface changes as per the flipping direction.

Analysis under running point and move the mouse on the surface and it will show the details of the surface degree Direct at each and every point of the surface.

B surface

In the case of class A surfers, the surface below is called the core, and the surface above is called the cavity.

Class A is an aesthetic surface and Class B is an engineering surface.

Class B surface should be inside the Class A surface.

As class A is more complex and having multiple geometries. In this case, we can directly offset the Class A to 3 mm thus we can obtain B surface.

B surface is then checked for the connectivity of the surface, but it will show some patches on B surface. We have to close it by extracting the required boundaries with reference to the surface and spline the uncovered area and close it by using the multi-section surface sweep and extrude method.

All the closed patches are then joined together by using the join command and checked for the connectivity of the surface.

C surface.

C surface has been created from the boundary line of the Class A surface. And by extracting the supporting surface, then sweep the boundary line with reference to the extracted surface.

In order to get the sea surface first we have to create a boundary line of Class A surface or by using multiple extrapolated commands and check for its continuity of it.

Create a sweep with reference to the curve and the reference surface with a 90 degree. Angry and give the inside direction. Check for the continuity of the surface. If there is any gap for the extrapolated and trim all together, now we will get the Class C surface.

All the C surfaces are then trimmed to be surface. And then joined the trimmed surface. 2 Class A surface by join command. Then check it for connectivity. Of the surface, We will get the final component. Again Check whether the final body Is closed by Using the boundary comment.

A close solid body can be obtained by using the close surface on Part Workbench by selecting the final trimmed component.

Close body Is created by using the close surface on part workbench by selecting the final trimmed component and do the draft analysis for the same.